Dead as a Doornail (#5) by Charlaine Harris

Sookie's got just a month, before the next full moon, to find out who wants her brother dead - and to stop the fiend!

Sookie Stackhouse enjoys her life, mostly. She's a great cocktail waitress in a fun bar; she has a love life, albeit a bit complicated, and most people have come to terms with her telepathy. The problem is, Sookie wants a quiet life - but things just seem to happen to her and her friends.

Now her brother Jason's eyes are starting to change: he's about to turn into a were-panther for the first time. She can deal with that, but her normal sisterly concern turns to cold fear when a sniper sets his deadly sights on the local changeling population. She afraid not just because Jason's at risk, but because his new were-brethren suspect Jason may be the shooter.

Sookie has until the next full moon to find out who's behind the attacks - unless the killer decides to find her first.

The Sookie Stackhouse books are delightful Southern Gothic supernatural mysteries, starring Sookie, the telepathic cocktail waitress, and a cast of increasingly colourful characters, including vampires, werewolves and things that really do go bump in the night.